HX711 not correct value (-8388608)

[Pepam]

Hi,

Want to read data from HX711 adc amplifer with wheatstone bridge loadcells, but when i run the program, my output is <info> app: ADC measuremement -8388608 all the time. Do somebody know what should be the problem? Using nRF52832, SDK 15.2 and Segger ambedded studio. The code i am running is from this string written by Vidar Berg https://devzone.nordicsemi.com/f/nordic-q-a/40271/timer-issue-with-hx711---stopped-by-vector-catch-error (ble_app_uart_w_hx711.zip)

regards

[Vidar Berg]

Hi,

Have you tried powering the load cell and hx711 directly from VDD instead of a GPIO, and do you have a stable supply voltage above 2.6V? It's hard to say what the problem is, but the ADC seems to be responding at least. A logic analyzer may help you narrow down the issue. E.g., verify that the ADC actually returns 0x800000.

Best regards,

Vidar

[Pepam]

Solved by powering the load cell from VDD. Working better with external voltage stabilizer 3,3V from external power source. Thanks much Vidar.